Question
If the 4-digit number x67y is exactly divisible by 9,
then the least value of (x + y) is _____.Solution
x67y is exactly divisible by 9 The sum of its digits must be divisible by 9 x + 6 + 7 + y = x + y + 13 is divisible by 9 Minimum value x + y must be equal to 5 because then the sum will be 18 and it is divisible by 9. ∴ The least value of (x + y) is 5.
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9, 10, 65, 27, 217, 50- Find the wrong number in the given number series.
300, 600, 200, 900, 112.5, 1125 178, 184, 196, 216, 246, 286
2400,3600,5400,7200,12150
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